Tracking long panning shots
Yes, this is possible, although you will need to use the tripod solver. Also, you will have a difficult time doing a 3d scene reconstruction, because blender can't track depth in a panning-only shot. Also, make sure there is no zooming, as blender doesn't handle that correctly as of yet. Finally, make sure you have a decent number of solid keyframes (10ish) at each frame, and that the trackers are getting disabled AS SOON AS they begin to deviate (or be &quot;obscured&quot; by the edge of the screen).
Here are is the &quot;Ultimate&quot; BSE answer on motion tracking (required reading for anyone interested in blender's motion tracker):
https://blender.stackexchange.com/a/42332/28015